R Questions Set 14:
Quiz Mode
Which function replicates elements of vectors?
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Which level plotting commands generate figures?
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How to check if an R object is NULL?
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The ______ function cross-tabulates tables using formulas.
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We can dump() R objects to a file by passing _____
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Which of the following extracts the first element from the R vector below?
x <- c("a", "b", "c", "c", "d", "a")
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A function that returns a vector of the same size as x with the elements arranged in increasing order.
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Setting the random number seed with _____ ensures reproducibility of the sequence of random numbers.
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Code to generate a sequence of integers from 1 to 10
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Which of the following R code can be used to avoid numeric problems such as taking the logarithm of a non-positive number?
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